't much worse. >> roberts had no criminal record. investigators say he stole the rifle he used from someone he knew. so far there is no apparent motive for the attack. >>> new details tonight on what happened before the discovery of two people found bound and gagged in the middle of a san francisco street. joe vasquez on how the brutal crime went down, and the cryptic aliases the suspects went by. >> reporter: according to court document, the two male sense, one carrying a gun, went inside this home at 3733 san bruno avenue, assaulted the male victim, steven reed, then tied his hands behind his back. then prosecutors say the suspects beat the female victim, 19-year-old audrey prado, hog-tied her averages to her ankles, then gagged her with a sock. last night, a resident here told linda yi that the police took key evidence away including bedding. >> like what? >> a computer , mattresses, like, beds. >> reporter: after they drove away, police believe one of the suspects shot steven in the neck. both victims were dumped on a sidewalk a half mile away. steven reed was dead. prado is st
